How to get a GPS fix quicker on the Nokia N95

Nokia have released a service known as Assisted GPS (A-GPS) leading to quicker first satellite fixes for phones with inbuilt GPS such as the Nokia N95. It works by positioning via GPRS which means that data connection charges apply. After backing up your phone’s data to a memory card, you’ll need to head over to the Nokia Software Update site for more information.

However, despite reports of success here and here, I can’t even get to download the firmware. It just says there’s none available when I run the Nokia Software Updater. Has anyone any suggestions?